<template>
  <div class="app-container">
    <el-form label-width="120px">
      <el-form-item label="信息描述">
        <el-tag type="info">excel模版说明</el-tag>
        <el-tag>
          <i class="el-icon-download"/>
          <a :href="'/static/01.xlsx'">点击下载模版</a>
        </el-tag>
      </el-form-item>
      <el-form-item label="选择Excel">
        <el-upload
          ref="upload"
          :auto-upload="false"
          :on-success="fileUploadSuccess"
          :on-error="fileUploadError"
          :disabled="importBtnDisabled"
          :limit="1"
          :action="BASE_API+'/eduService/subject/addSubject'"
          name="file"
          accept="application/vnd.ms-excel"> <!-- 上传文件格式 -->
          <el-button slot="trigger" size="small" type="primary">选取文件</el-button>
          <el-button
            :loading="loading"
            style="margin-left: 10px;"
            size="small"
            type="success"
            @click="submitUpload">{{ fileUploadBtnText }}</el-button>
        </el-upload>
      </el-form-item>
    </el-form>
  </div>
</template>
<script>
    export default {
        data() {
            return {
                BASE_API: process.env.BASE_API, // 接口API地址
                fileUploadBtnText: '上传到服务器', // 按钮文字
                importBtnDisabled: false, // 按钮是否禁用,
                loading: false
            }
        },
        created() {

        },
        methods: {
            //点击按钮上传文件到接口里面
            submitUpload() {
                this.importBtnDisabled = true
                this.loading = true
                this.$refs.upload.submit()
            },
            //上传成功后
            fileUploadSuccess(response) {
                console.log('上传成功')
                this.loading = false
                this.$message({
                    type: 'success',
                    message: response.message
                })
                //跳转到课程分类列表
                this.$router.push({path: '/subject/table'})
            },
            //上传失败后
            fileUploadError() {
                this.loading = false
                this.$message({
                    type: 'error',
                    message: "导入失败"
                })
            }
        }
    }
</script>